EP0232128A3 - Filtering devices - Google Patents
Filtering devicesInfo
- Publication number
- EP0232128A3 EP0232128A3 EP87300772A EP87300772A EP0232128A3 EP 0232128 A3 EP0232128 A3 EP 0232128A3 EP 87300772 A EP87300772 A EP 87300772A EP 87300772 A EP87300772 A EP 87300772A EP 0232128 A3 EP0232128 A3 EP 0232128A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- shower
- nozzles
- centre
- locations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000001914 filtration Methods 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/018—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements ring shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
- B01D29/6446—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/04—Flat screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/48—Overflow systems
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filtering device suitable for use in, for example, the
papermaking industry has a generally-horizontal circular screen
(7) onto which the liquid to be filtered flows from a tank (l)
around the periphery of the screen. Solids filtered out of
the liquid remain on the screen and are moved by a shower (l8)
to an outlet (6) at the centre of the screen. The shower (l8)
comprises several horizontal spray bars which extend radially
across the screen and rotate about an axis at the centre of
the screen. Each bar has a set of nozzles (l9), the locations
of which are staggered with respect to the nozzle locations
on the other bars. This ensures that the impact areas of one
set of nozzles (l9) on the screen (7) do not follow the same
paths over the screen as the preceding set of nozzles so that a
more even coverage of the screen by the shower (l8) is achieved.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8602365 | 1986-01-31 | ||
GB868602365A GB8602365D0 (en) | 1986-01-31 | 1986-01-31 | Filtering devices |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0232128A2 EP0232128A2 (en) | 1987-08-12 |
EP0232128A3 true EP0232128A3 (en) | 1988-07-13 |
Family
ID=10592276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87300772A Withdrawn EP0232128A3 (en) | 1986-01-31 | 1987-01-29 | Filtering devices |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0232128A3 (en) |
FI (1) | FI870409A (en) |
GB (1) | GB8602365D0 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5152891A (en) * | 1990-09-13 | 1992-10-06 | T/M Industrial Supply, Inc. | Self-cleaning strainer |
US5259955A (en) * | 1991-07-10 | 1993-11-09 | Bolton Joseph A | Vacuum strainer |
US5453193A (en) * | 1994-01-04 | 1995-09-26 | Thermo Fibertek Inc. | Strainer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE952492C (en) * | 1953-02-12 | 1956-11-15 | Ernst Gustav Drautz | Sorters, knots, knots and splinters for the paper, cardboard, fiber board, wood pulp and cellulose industries |
AT193713B (en) * | 1942-01-13 | 1957-12-10 | Nils Walfrid Joensson | Device for sieving, dewatering or washing pulp suspensions |
AT338608B (en) * | 1974-10-11 | 1977-09-12 | Voith Gmbh J M | DEVICE FOR SEPARATING LARGE MATERIAL FROM FIBER FLUSHING |
-
1986
- 1986-01-31 GB GB868602365A patent/GB8602365D0/en active Pending
-
1987
- 1987-01-29 EP EP87300772A patent/EP0232128A3/en not_active Withdrawn
- 1987-01-30 FI FI870409A patent/FI870409A/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT193713B (en) * | 1942-01-13 | 1957-12-10 | Nils Walfrid Joensson | Device for sieving, dewatering or washing pulp suspensions |
DE952492C (en) * | 1953-02-12 | 1956-11-15 | Ernst Gustav Drautz | Sorters, knots, knots and splinters for the paper, cardboard, fiber board, wood pulp and cellulose industries |
AT338608B (en) * | 1974-10-11 | 1977-09-12 | Voith Gmbh J M | DEVICE FOR SEPARATING LARGE MATERIAL FROM FIBER FLUSHING |
Also Published As
Publication number | Publication date |
---|---|
EP0232128A2 (en) | 1987-08-12 |
FI870409A (en) | 1987-08-01 |
FI870409A0 (en) | 1987-01-30 |
GB8602365D0 (en) | 1986-03-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19890116 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HUDON, JAMES DENIS |